How many grams is 2 drops of food coloring?

the chemical formula of potassium dichromate is K2Cr2O7.state the ratio of potassium, chromium and oxygen atom in the compounds

Len [333]

Answer:

Potassium Dichromate is an orange to red colored, crystalline, inorganic compound that emits toxic chromium fumes upon heating. Potassium dichromate is highly corrosive and is a strong oxidizing agent. This substance is used in wood preservatives, in the manufacture of pigments and in photomechanical processes, but is mainly replaced by sodium dichromate. Potassium dichromate primarily affects the respiratory tract causing ulcerations, shortness of breath, bronchitis, pneumonia and asthma but can also affect the gastrointestinal tract, liver, kidneys and immune system. This substance is a known human carcinogen and is associated with an increased risk of developing lung cancer and cancer of the sinonasal cavity. (NCI05)

3 0

4 years ago

Complete and balance each of the following equations. If no reaction occurs, enter NOREACTION.

Tatiana [17]

Answer

Part A:

Given equation:

$KI_{(aq)}+BaS_{(aq)}\rightarrow$

The above equation is an example of a double replacement reaction. A double replacement (or double displacement) reaction is a reaction in which the positive and negative ions of two ionic compounds exchange.

Note: The oxidation number of:

K = +1

I = -1

Ba = +2

S = -2

So, the complete chemical equation including phases of the given reaction is:

$2KI_{(aq)}+BaS_{(aq)}\rightarrow BaI_{2(aq)}+K_2S_{(s)}$

Part B:

Given equation:

$KCl_{(aq)}+CaS_{(aq)}\rightarrow$

Also, the equation is an example of a double replacement reaction.

Note: The oxidation number of:

K = +1

Cl = -1

Ca = +2

S = -2

The complete chemical equation including phases of the given reaction is:

$2KCl_{(aq)}+CaS_{(aq)}\rightarrow K_2S_{(s)}+CaCl_{2(aq)}$

5 0

2 years ago

You have performed a serial dilution of an unknown sample and counted 73 CFU on a countable plate that was marked as a 10^-4 dil

dexar [7]

Hey there!:

To find the original sample population density, divide the conted colonies by the dilution factor and the inoculate:

= 73 / (10⁻⁴ * 0.1)

= 73*10⁵

Thus, the original sample's population density was 7.3*10⁶ or 73* 10⁵.

Hope this helps!

4 0

3 years ago

Which can be excluded due to the absence of fossil records

xeze [42]

Answer:

a. body of jellyfish

Explanation:

it is because they are made up of 95 percent of water and cannot be stored in rocks as fossil ...plz add my answer as brainliest

8 0

3 years ago

g If attempting to dissolve both silver bromide and silver chloride in aqueous solution through complex ion formation, which dat

ziro4ka [17]

Answer:

Kf

Explanation:

The stability constant Kf of a given complex specie is an equilibrium constant that represents the formation of that particular complex specie in solution. It measures the strength of the interaction between the ligands and metal that form the particular complex specie. The magnitude of Kf shows how easily a complex specie is formed in solution.

Hence if I want to dissolve the bromides or chlorides of silver which are ordinarily insoluble in water by means of complex formation, the magnitude of the stability constant for each particular complex specie is important as it gives information regarding the thermodynamic feasibility of the process.

7 0

3 years ago